61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
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p.
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<span class="location-badge">exported from <a href="/angular2/directives">angular2/directives</a></span>
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defined in <a href="https://github.com/angular/angular/tree/master/modules/angular2/src/directives/switch.js#L39">angular2/src/directives/switch.js (line 39)</a>
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:markdown
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The `Switch` directive is used to conditionally swap DOM structure on your template based on a
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scope expression.
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Elements within `Switch` but without `SwitchWhen` or `SwitchDefault` directives will be
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preserved at the location as specified in the template.
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`Switch` simply chooses nested elements and makes them visible based on which element matches
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the value obtained from the evaluated expression. In other words, you define a container element
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(where you place the directive), place an expression on the **`[switch]="..."` attribute**),
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define any inner elements inside of the directive and place a `[switch-when]` attribute per
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element.
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The when attribute is used to inform Switch which element to display when the expression is
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evaluated. If a matching expression is not found via a when attribute then an element with the
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default attribute is displayed.
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# Example:
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```
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<ANY [switch]="expression">
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<template [switch-when]="whenExpression1">...</template>
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<template [switch-when]="whenExpression1">...</template>
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<template [switch-default]>...</template>
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</ANY>
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```
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.l-main-section
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h2 Members
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.l-sub-section
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h3 constructor
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pre.prettyprint
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code.
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constructor()
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:markdown
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.l-sub-section
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h3 value
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pre.prettyprint
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code.
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value(value)
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:markdown
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